Title (en)

ACOUSTIC PRINTHEADS

Publication

EP 0272154 A3 19891018 (EN)

Application

EP 87311225 A 19871218

Priority

US 94449086 A 19861219

Abstract (en)

[origin: EP0272154A2] A printhead (11) for an acoustic printer comprises one or more acoustic microlenses (12), each of which brings an acoustic beam (13) to focus approximately at the free surface (15) of a pool (14) of ink for ejecting individual droplets (16) of ink from the pool (14) on demand. As used herein, an "acoustic microlens" is defined as being an acoustic lens (12) having an aperture diameter (A) which is less than an order of magnitude greater than the wavelength of the incident acoustic wave (i. e., the acoustic wave which illuminates the lens).

IPC 1-7

B41J 3/04

IPC 8 full level

B41J 2/015 (2006.01); B41J 2/14 (2006.01)

CPC (source: EP US)

B41J 2/14008 (2013.01 - EP US); B41J 2002/14322 (2013.01 - EP US)

Citation (search report)

• [AP] EP 0216589 A2 19870401 - XEROX CORP [US]
• [A] US 3211088 A 19651012 - MARK NAIMAN
• [AD] US 4308547 A 19811229 - LOVELADY KENNETH T, et al
• [A] EP 0033751 A1 19810819 - HITACHI LTD [JP]
• [A] EP 0005857 A1 19791212 - ADVANCED DIAGNOSTIC RES [US]

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0272154 A2 19880622; EP 0272154 A3 19891018; EP 0272154 B1 19930915; CA 1292386 C 19911126; DE 3787454 D1 19931021; DE 3787454 T2 19940324; JP H0717055 B2 19950301; JP S63166548 A 19880709; US 4751529 A 19880614

DOCDB simple family (application)

EP 87311225 A 19871218; CA 550783 A 19871102; DE 3787454 T 19871218; JP 31180987 A 19871209; US 94449086 A 19861219